Abstract
The comparative value of al bac, 8111.1mycin. and O-tetra-45 as feed additives was determined on the basis of performance of broiler chicks The hirdsfed rations containing different feed additives gained 7.30 to 15.15% higher weight, consumed 1.23 to 7.86% more feed, utilized 4,51 to 6.39 Less feed per unit gain and had 3.35 to 5.06% more dressed weight than those on control. The effect on feed consumption and feed efficiency was, however, Tian-significant. The broiler chicks showed comparatively 'better performance on 0-tetra-45 followed by aft ao and gallamycin, the difference being non-significant.
INTRODUCTION
Inspice of the fact that the growth rate of poultry dvielopment in Pakistan had been 15% per annum during the last decade (Anonymous, 1985), the optimum production performance of exotic breeds and strains could not be achieved. A number of factors seem to influence the production performance of broilers, the most important being climatic stress, infectious and parasitic infesta.tions early chick mortality and poor quality of feed. A unstained economic growth of poultry industry has been claimed by the use of antibiotics as feed additives. Awan f1985) compared a number of antibiotic feed additives with a view to recommend the most effective preparation. He rated albac, gallamycin and 0-tetra45 as the best out of 9 feed additives available in the market-The study under report was conducted to further confirm the compara-tive value of the three best rated feed additives in terms of weight gain, feed consumption, feed of and dressing percentage in broiler chicks.
